arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2002.09890hep-ph
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高能pp碰撞中矢量介子的自旋排列

The Spin Alignment of Vector Mesons in High Energy pp Collisions

Kai-bao Chen, Zuo-tang Liang, Yu-kun Song, Shu-yi Wei

摘要:

高能反应中产生的矢量介子的自旋排列由自旋相关碎裂函数$D_{1LL} (z,μ_f)$决定,该函数与碎裂夸克的极化无关.在本文中,我们提取的自旋相关的碎裂函数$D_{1LL} (z,μ_f)$从数据上的自旋排列的$K^{*0}$在$e^+e^-$湮灭在LEP在两种不同的情况下,并将它们应用于$pp$碰撞作出预测。我们做了详细的分析,从不同的子过程的贡献,并表明自旋对齐应该是相当显着的,也在高能量$pp$碰撞。

英文摘要:

The spin alignment of vector meson produced in high energy reactions is determined by the spin-dependent fragmentation function $D_{1LL} (z,μ_f)$ that is shown to be independent of the polarization of the fragmenting quark. In this paper, we extract the spin-dependent fragmentation function $D_{1LL} (z,μ_f)$ from data on the spin alignment of $K^{*0}$ in $e^+e^-$ annihilation at LEP in two different scenarios and apply them to make predictions in $pp$ collisions. We make detailed analysis of contributions from different sub-processes and show that the spin alignment should be quite significant also in high energy $pp$ collisions.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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